Today’s Unicode calligraphy highlights the International Phonetic Alphabet symbol for the glottal stop, the sound between the syllables of “uh-oh”. (It can also be heard if you say the phrase “glottal stop” in a Cockney accent!)
In Squamish orthography, the glottal stop is represented by the digit 7 instead of ʔ, as in Sḵwx̱wú7mesh.